PlayStation VR CUH-ZVR2 is the updated version of the headset, while PSVRCUH-ZVR1 is the launch model. PSVRCUH-ZVR2 makes a few minor changes to the original headset, streamlining its cabling and integrating its stereo headphones into the headset itself. The biggest change, though, is to the Processor Unit, which allows HDR passthrough when playing on a compatible 4K television. This is one of the biggest oversights of the original PSVR, as you needed to swap out cables in order to take advantage of HDR.